Test 2 Heart Vocab Flashcards
the region of the thoracic cavity between the lungs
mediastinum
pointed area of the heart directed toward the left hip
apex
broader posterosuperior aspect where the great vessels of the body emerge
base
layers that envelop the heart
pericarduim
serous membrane that tightly hugs the external surface of the heart and is part of the heart wall
epicardium
cardiac muscle layer of the heart wall
myocardium
the endothelial membrane lining the interior of the heart
endocardium
severe, suffocating chest pain caused by a brief lack of oxygen supply to the heart muscle
angina pectoris
a condition when there are dead tissue areas of the myocardium caused by an interruption of blood supply to the heart
myocardial infarction
sets basic rhythm, composed of special tissue causes heart muscle depolarization from atria to ventricles
intrinsic conduction system (nodal system)
mass of specialized myocardial cells in the wall of the right atrium, pacemaker of the heart
sinoatrial noda (SA node)
local decrease in blood supplu
ischemia
irregular, uncoordinated contraction of muscle cells particularly of the heart musculature
fibrilation
abnormal, excessively rapid heart rate, over 100 bpm
tachycardia
slow heart beat usually defined as a rate under 60 bpm
bradychardia